Kobayashi was captivated by the sight at first sight.On the day he visits his friend's house, Kobayashi witnesses his friend's mother Chisato in her underwear in the bathroom.She's beautiful, but her underwear is ugly...A big bread that is unrelated to fashion that seeks only functionality.However, for the virgin Kobayashi, who had fantasies about women, it was the first time he saw a real woman.Since then, Kobayashi has been stealing Chisato's underwear whenever possible.And before I knew it, I came to think that Senri was the only person I could give my virginity to.